In this Oct. 10, 2014 photo, Atlee Breland, president of Parents Against Personhood, speaks during a news conference and rally against Amendment 67, the so-called personhood measure, at Planned Parenthood of the Rocky Mountains, in Denver. Colorado voters will see a third attempt to extend rights to unborn children on ballots this year. But it?s not clear what exactly this year?s so-called ?personhood? measure would do if it?s approved. (AP Photo/Brennan Linsley)

Amendment 67, the anti-abortion proposal seeking to define “person” and “child” in the Colorado criminal code as “unborn human beings,” lost by a 2-1 margin.

About 64 percent of voters said no to the third personhood measure to fail at the ballot since 2008.

The Colorado criminal code defines a “person” as someone who had been born and was alive at the time of the crime. It excludes a human embryo, fetus and unborn child at any stage of development before live birth.

Amendment supporters, such as the Colorado Personhood Coalition, said it should be illegal to kill or harm an unborn human being and offenders should be held criminally and civilly liable. The measure would have established the legal foundation to end abortion in Colorado.

Opponents said Colorado already has laws that protect pregnant women endangered by the criminal acts yet leaves medical decisions to the woman and her doctor.

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